A study of the atmospheric dispersion of a high release of krypton-85 above a complex coastal terrain, comparison with the predictions of Gaussian models (Briggs, Doury, ADMS4)
| Autor: | O. Connan, D. Maro, M. Rozet, D. Hébert, S. Le Cavelier, Luc Solier, C. Leroy |
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| Přispěvatelé: | Laboratoire de Radioécologie de Cherbourg-Octeville (LRC), Institut de Radioprotection et de Sûreté Nucléaire (IRSN) |
| Rok vydání: | 2010 |
| Předmět: |
Air concentration measurements
010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis Gaussian Nuclear fuel reprocessing Gaussian method Normal Distribution Built-up areas 010501 environmental sciences 7. Clean energy 01 natural sciences Standard deviation complex terrain Plume dispersion Dispersion (optics) Industrial poisons Dispersions radionuclide Waste Management and Disposal Radioactive Complex terrains Radiological protection comparative study Air Movements Air Pollutants concentration (composition) Geography atmospheric pollution article Gaussian model Manche General Medicine simulation Pollution Plume [SDE]Environmental Sciences symbols radiation measurement Atmospheric conditions dispersion France La Hague Radiology Transfer coefficient Meteorology Gaussian plume models Gaussian distribution Fuels atmospheric plume Krypton-85 symbols.namesake Radiation Monitoring TRACER Atmospheric release Coastal terrain Environmental Chemistry atmospheric dispersion Nuclear safety Atmospheric movements 0105 earth and related environmental sciences krypton Radionuclide Landforms krypton 85 Atmosphere Second generation Nuclear energy Krypton Radioisotopes prediction Atmospheric dispersion modeling kernel method 13. Climate action Air Pollutants Radioactive Environmental science numerical model Basse Normandie French Institute |
| Zdroj: | Journal of Environmental Radioactivity Journal of Environmental Radioactivity, Elsevier, 2010, 101 (11), pp.937-944. ⟨10.1016/j.jenvrad.2010.06.011⟩ |
| ISSN: | 1879-1700 0265-931X |
| DOI: | 10.1016/j.jenvrad.2010.06.011⟩ |
| Popis: | cited By 13; Atmospheric releases of krypton-85, from the nuclear fuel reprocessing plant at the AREVA NC facility at La Hague (France), were used to test Gaussian models of dispersion. In 2001-2002, the French Institute for Radiological Protection and Nuclear Safety (IRSN) studied the atmospheric dispersion of 15 releases, using krypton-85 as a tracer for plumes emitted from two 100-m-high stacks. Krypton-85 is a chemically inert radionuclide. Krypton-85 air concentration measurements were performed on the ground in the downwind direction, at distances between 0.36 and 3.3 km from the release, by neutral or slightly unstable atmospheric conditions. The standard deviation for the horizontal dispersion of the plume and the Atmospheric Transfer Coefficient (ATC) were determined from these measurements. The experimental results were compared with calculations using first generation (Doury, Briggs) and second generation (ADMS 4.0) Gaussian models. The ADMS 4.0 model was used in two configurations; one takes account of the effect of the built-up area, and the other the effect of the roughness of the surface on the plume dispersion. Only the Briggs model correctly reproduced the measured values for the width of the plume, whereas the ADMS 4.0 model overestimated it and the Doury model underestimated it. The agreement of the models with measured values of the ATC varied according to distance from the release point. For distances less than 2 km from the release point, the ADMS 4.0 model achieved the best agreement between model and measurement; beyond this distance, the best agreement was achieved by the Briggs and Doury models. © 2010 Elsevier Ltd. |
| Databáze: | OpenAIRE |
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